Physical Evidence Fingerprint Analysis!

One final piece of evidence to investigate were the fingerprints left on Sangita Mistry's iPhone case. No two people have the same fingerprints, not even identical twins. This means that the police are able to make accurate matches between suspects and prints left at the crime scene. The four main prints that police look for are: whorls, loops, arches and composite prints.!!Our evidence:!1) Photo of three fingerprints on the case.!

 !

!

2) Fingerprint samples from Brodie Smith, Marco Albenni, Sangita Mistry, Debbie Downes.!Observe the fingerprints on the phone case. Look for the fingerprint styles to make a match.!

Whose fingerprints match those found on the iPhone case? Based on all of the evidence you've investigated, can you identify the phone thief?!

 !

!!!!

  Right ring style

Right middle style

Right forefinger style

Match Y/N

Brodie Smith  !      

Marco Albenni        

Sangita Mistry        

Debbie Downes        

-Loops are found in 65% of the population (Most Common)!!-Whorls are found in 35% of the population!!-Arches are found in 5% of the population (Least Common)

LESSON�9:�RESOURCE�2� � � Name:�______________________________��Work�with�a�partner�to�carefully�take�each�other’s�fingerprints.�Make�sure�you�cover�the�fingertip�in�ink/�pencil�lead�and�roll�each�finger�from�nail�to�nail.���Take�each�individual�finger�print�and�at�the�bottom,�do�the�full�hand�print.��What�patterns�do�you�notice?�Are�there�any�accidental�characteristics�in�the�prints?�Discuss!��� � � � �

FINGERPRINTS�